Fuel-economizer for cooking-stoves



J. DAWSON.

FUEL ECONOMIZER FOR COOKING STOVES.

APPLICATION FILED SEPT. 5. 1918.

1,346,445. Patented July 13,1920.

UNITED STATES PATENT OFFICE.

JAMES DAWSON, OF OAKLAND, CALIFORNIA, ASSIGNOR TO CHARLES G. GANIPBELL, OF A LAMEDA COUNTY, CALIFURNIA.

FUEL-ECONOMTZER FOR CDQKING-STOVES.

Application filed September 5, 1918.

T 0 all whom it may concern:

Be it known that I, JAMns'DAwsoN, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented new and useful Improvements in Fuel-lilconomizers for Cooking-Stoves, of which the following is a specification.

The present invention relates to improvements in appliancesfor economizing in the consumption of gas. The object of the invention is (to provide such an appliance which will be comparatively simple and inexpensive in construction, and convenient and very efficient in use. V

In the accompanying drawing, Figure 1 is a perspective View showing. the invention in use on a two burner gas stove attached to a coal cooking stove; Fig. 2 is an enlarged plan view of the invention detached; Fig. 8 is a longitudinal sectional view-thereof on the line 33 of Fig. 2; Fig. 1 is a crosssectional view thereof on the line 4 l of Fig. 2.

My improvement is preferably made wholly ofsheet metal, and on referring to the drawing it will be seen that it-colnprises two bands 2, which are of nearly uniform width throughout, of resilient sheet metal, preferably sheet steel. Said bands are each attached at one end, as shown at 3, to the ends of a wider band l. After extending from the ends of said wider band i in directions slightly divergent, they then are curved in an approximately cylindrical form. One of said bands is formed near its free end with a series of holes 6 and the other band is formed at its extreme free end with a tooth or hook 7 adapted to enter any one of the holes 6, the free terminal portions of the bands then lying closely adjacent to each other, one within the other, and a metal loop 8, surrounds the adjacent termiminal portions of the bands and can be slid thereon to hold them together. By sliding the loop of the band 2 formed with the holes 6, the free terminal portions of the bands can be separated and the tooth or hook 7 can be removed from one of said holes 6 and inserted in another of said holes to increase or diminish the area contained within the bands.

The ends of the wider band d taper in width to that of the ends attached thereto of the bands 2. The main portion of the Specification of Letters Patent.

Serial No. 252,688.

band is riveted at intervals as shown at 9, to an arcuate band 11 of substantially the same width as the band at, said band 11 extending in a circular arc of nearly 270 degrees. The band 4, between each pair of rivets 9, is bent outward and then again inward, so that said band i is of a segmental star-shaped form having rounded points 12. Said rounded points extend a considerable distance from the band 11..

The lower edges of the bands 2, 1- and 11 all extend in the same plane, but the upper edge of the band 11, which, like that of the band 4', is raised considerably above the upper edges of the bands 2, is cut through in two places between each pair of adjacent rivets 9 so as to form tongues 13, which are bent outwardly from the upper edge of band 11 toward the corresponding point 12 of the star-shaped band 1-. A sheet metal apron 14 is provided to cover the space between that inclosed by the bands 2 and'that inclosed by the band 11. Said apron 1 1 comprises an upper horizontal portion 16 resting upon the upper edge of the wide portion of the band a and having margins 17 bent downward and riveted, as shownat 18, to theupper margins ofsaid wide portion of the band 4, a sloping portion 19 having margins bent downward closely adjacent to the marginal portions of that part of the band 4 the upper edge of which slopes downward and is intermediate between its wide and narrow portions, anda lower horizontal portion 21, having margins bent downward and riveted, as shown at 22, to the straight slightly diverging portions of the bands 2. The free edges of the horizontal portions 16 and 21 are concaved in arcs which complete the circles partly formed by the bands 2 and 11 respectively. 7

In order that the apron 1.4 may extend in the same horizontal plane as the upper edges of the arcuate portions of the said bands 2, said edges are cut down to form shoulders, against which the ends of the portion 21 of the apron 1 1 can abut so that the arcuate portions of said bands 2 are slightly higher than the straight diverging portions thereof to which the apron 18 and the ends of the band 4 are attached.

The mode of use of my improved gas economizer may be best illustrated by supposing it to be applied to a gas cooking stove and it is here shown as applied to a Patented July 13, 1920.

two-burner gas cooking stove attached to a coal cooking stove. The appliance is placed on the gas stove so that the bands 2 surround one of the burners. 'The remaining portion of the appliance may extend either in a direction over the other burner, which is not lighted, or over the cooking stove which is not in use, or in an intermediate direction, or in any direction, provided that the appliance be properly supported. A cook ing-vessel is then pl ac'ed upon the upper edges of'the bands 2, which thus form wall, confining the products of combustion, and, if it is sufliciently large, upon the lower portion 21 of the apron 14.7 The flames from the gas burner, after impinging against the bottom of the cooking vessel, can escape from the space inclosed by the bands 2' only by flowing out at oneside thereof beneath the apron 14s and into the space inclosed by the'band 11. If another cooking vessel is supported bytheupper edge or" this band 11,

and, if necessary, on account of its size, on

the upper portion 16 of the apron 14, and upon portions of the upper edge of the starshaped part of the'band 4, the flames will then impinge against the bottom of said latter vessel, said band 11 forming a wall compelling the products of combustion to flow through the openings made in the top of said band made by cutting out the tongues 13. Said products of combustion then flow outward and up at the sides of the lastnamed vessel.

In the use of an ordinary burner of a gas cooking stove a considerable portion 01" the heat or the gas is wasted. But by the use of this economizer practicallyall of the heat of cally no danger-of burning the food when in a vessel placed upon what may be termed the auxiliary portion of the appliance.

In order to contain the heat therewithin the inner surfaces of the walls 2 and 11 are lined with asbestos 24 except the part of the wall 2 which is formed with the series of apertures 6. i V

'Iclaim: i

In a gas economizer, the combination of a wall adapted to surround a burner of a gas cooking stove and to support a cooking vessel thereon and prevent the escape of the products of combustion except on one side thereof, walls communicating with the first named wall and forming a conduit through which the products of combustion flow when escaping, a wall forming aheating chamber communicating with said conduit and into which said products of combustion escape, said latter wall being higher than said first mentioned wall, and also being adapted to a support a cooking vessel, openings in the upper edge of said second wall for the escape of the products of combustion and a star shaped band attached to said last mentioned wall and. adapted to deflect the products of combustionupwardly around thefsides of an overlying vessel.

: JAMES Dawson. 

